Step 1 - Install some kind of OS for RPI i like to use elovalvos images from the forum, but you can use what ever probably, https://forum.linuxcnc.org/9-installing-linuxcnc/39779-rpi4-raspbian-64-bit-linuxcnc?start=340 or this one but its a bit old https://github.com/Expatria-Technologies/remora-flexi-hal/releases or this one, kinda old step 2, - install the component https://github.com/cakeslob/Remora/tree/nucleo_static/LinuxCNC/Components step3 - load the firmware https://github.com/cakeslob/Remora/tree/nucleo_static/Firmware/FirmwareBin/NUCLEO_F446RE drag and drop this thing via usb step 4 - make the cable https://github.com/cakeslob/Remora-docs/blob/nucleo/docs/source/hardware/nucleo446.rst#wiring-to-raspberry-pi-for-spi-communication i think i included one of these cables step 5 try the config https://github.com/cakeslob/Remora/tree/nucleo_static/LinuxCNC/ConfigSamples/remora-xy_nuc stuff might be regressed